The German international was forced to sing in front of his teammates to mark his arrival at the club following a deadline day switch from Real Madrid.
"When I sing, I do not like my voice," Ozil told DFB.de. "I do not think my colleagues understood what I sung, but I was glad that that is behind me.
"I must admit that there is still a little hitch with my English because I definitely have to work on it."
The Gunners are currently at the top of the Premier League table.